A parametric study on the dynamic lateral earth forces on retaining walls according to European and Turkish Building Earthquake Codes

Yıl 2023, Cilt: 7 Sayı: 3, 196 - 207, 05.07.2023

Özgür Lütfi Ertuğrul Babur Bek Zahın

https://doi.org/10.31127/tuje.1100015

Öz

In the earthquake regulations of many countries, Mononobe-Okabe method was used to determine the seismic lateral earth forces and earth pressure coefficients for the design of retaining structures. However, there are various interpretation differences of this method between earthquake regulations of different countries. In this study, effect of different seismic acceleration coefficients (S_DS) and different soil friction angles(ϕ_d^,) on the seismic earth forces acting on a high retaining structure were investigated through a parametric study based on the methods described in 2018 Turkish Building Earthquake Code (TBEC-2018) and EuroCode-8 (EC-8). For this purpose, approximately 120 analyzes were carried out by using different parameters and the analysis results were shown in tables and figures. Analyses were performed for yielding rigid retaining walls and anchored walls for the principles defined in the mentioned earthquake codes. It was observed that the seismic lateral force estimations made with TBEC-2018 are higher compared to values calculated according to EuroCode-8. In the calculation of dynamic thrust, unexpected results may occur at some critical values of θ angle which is dependent on the lateral acceleration coefficient.

Anahtar Kelimeler

Seismic acceleration coefficient, Soil friction angle, Lateral earth forces, Retaining Structures

Kaynakça

• Bowles, L. E. (1996). Foundation analysis and design. New York: McGraw-Hill.
• Okabe, S. (1926). General theory of earth pressures. J. Japan. Soc.Civil Eng., 12(1), 123-134.
• Mononobe, N., & Matsuo, M. (1929). On the determination of earth pressures during earthquakes. Proc. World Engrg. Congress, 9, pp. 179-187.
• Kramer,S. L. (1996). Geotechnical earthquake engineering. India: Pearson Education.
• Das, B. M. and Sobhan, K. (2013). Principles of geotechnical engineering. USA: Cengage learning.
• Türkiye Bina Deprem Yönetmeliği (TBDY). (2018). Ankara: Bakan İşleri Genel Müdürlüğü, Deprem Araştırma Dairesi.
• Özberk, L. & Kahyaoğlu, M.R. (2018). Dayanma Yapılarının DBYBHY ve TBDY Gore Analiz Sonuçlarının Karşılaştırılması ve Tespitler. Zemin Mekaniği ve Geoteknik Mühendisliği, 17. Ulusal konferansı bildiri kitabı, 1-10. İstanbul
• Eurocode-8. (2004). Design Of Structures For Earthquake Resistance Of Structures-Part 5: Foundations, Retaining Structures And Geotechnical Aspects. European Standard, European Committee for Standardization.
• DBYBHY (2007). Deprem Bölgelerinde Yapılacak Binalar Hakkında Yönetmelik. Ankara: Çevre ve Şehircilik Bakanlığı.
• https://www.turkiye.gov.tr/afad-turkiye-deprem-tehlike-haritalari
• Gürsoy, Ş. (2013). İstinat Duvarlarına Etkiyen Aktif Zemin İtkilerinin Eurocode-8 ve Türkiye Deprem Yönetmeliğine Göre Karşılaştırılması. Karabük Üniversitesi, Gazi Üniversitesi Fen Bilimleri Dergisi, 1(4), 153-160.